SainSmart PRO-3 Tangle-Free Premium 1.75mm PETG 3D Printer Filament, Black PETG, 2.2 LBS (1KG) Spool, Dimensional Accuracy +/- 0.02mm

No Jamming at All Supported by an all-new technology called layer by layer, with 100% tangle-free. This ensures the filament printed extremely smooth and no more extruder become clogged again. Laser Precision Inspected by laser, PRO-3 ensures each inch of filament is precisely engineered to +/-0. 02mm error rate. Consistent round shape avoids unexpected interruption in printing. Smart Indicator smart length indicator is present on the surface of the clear PC spool for your convenience to know the length of your remaining filament. Durable and Strong Featuring with high impact-resistant and less warpage, PRO-3 PETG filament has minimal shrinkage and warping. Reputation PRO-3 PETG filament has the reputation of combining the functionality of ABS (stronger, temperature resistant, more durable) and reliability of PLA (easy to print) in one material.